GB1483923A - Beam positioning for optical scanning apparatus such as optical printers - Google Patents

Beam positioning for optical scanning apparatus such as optical printers

Info

Publication number
GB1483923A
GB1483923A GB45022/74A GB4502274A GB1483923A GB 1483923 A GB1483923 A GB 1483923A GB 45022/74 A GB45022/74 A GB 45022/74A GB 4502274 A GB4502274 A GB 4502274A GB 1483923 A GB1483923 A GB 1483923A
Authority
GB
United Kingdom
Prior art keywords
galvanometer
voltage
circuit
correction
response
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB45022/74A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of GB1483923A publication Critical patent/GB1483923A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/24—Details of cameras or camera bodies; Accessories therefor with means for separately producing marks on the film, e.g. title, time of exposure
    • G03B17/245—Optical means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K15/00—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers
    • G06K15/02—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers
    • G06K15/12—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2217/00—Details of cameras or camera bodies; Accessories therefor
    • G03B2217/24—Details of cameras or camera bodies; Accessories therefor with means for separately producing marks on the film
    • G03B2217/242—Details of the marking device
    • G03B2217/243—Optical devices

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Mechanical Optical Scanning Systems (AREA)
  • Facsimile Scanning Arrangements (AREA)

Abstract

1483923 Automatic control EASTMAN KODAK CO 17 Oct 1974 [23 Oct 1973] 45022/74 Heading G3N In a device for recording characters on a lightsensitive medium and having galvanometer driven mirrors 7, 8 which deflect a modulated light beam B, a beam position circuit 13 is provided to produce a drive signal for determining the positions of the lines of characters on a page 10, the circuit 13 including a linearity correction circuit 2 to compensate for non-linearitier in the response of the respective galvanometer. As shown, an optical printer unit comprises vertical and horizontal deflection galvanometers 6, 9 which rotate respective mirrors 7, 8. When it is desired to start a new line L 12 , a control unit 14 generates a digital code LP and a timing pulse T 1 which cause a position voltage LV' 12 to be applied to a summing amplifier 5 which drives galvanometer 6. In response to a second timing pulse T 2 , part or all of the code LP is also applied to a correction circuit 2 which supplies an appropriate correction voltage CV 3 to the other input of amplifier 5. The voltage CV 3 compensates for the predetermined non-linear response of galvanometer 6 in its position corresponding to the new line. The empirically determined correction voltages CV 1 to CV n are set by resistances CR 1 to Rn, Fig. 2 (not shown) and are selected by an analog multi-plexer (21). The lines on page 10 may be arranged in groups S 1 -S n , each correction voltage being applied throughout the time that its corresponding line group is being scanned.
GB45022/74A 1973-10-23 1974-10-17 Beam positioning for optical scanning apparatus such as optical printers Expired GB1483923A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US408350A US3882509A (en) 1973-10-23 1973-10-23 Linearity correction circuit for an optical scanning device

Publications (1)

Publication Number Publication Date
GB1483923A true GB1483923A (en) 1977-08-24

Family

ID=23615920

Family Applications (1)

Application Number Title Priority Date Filing Date
GB45022/74A Expired GB1483923A (en) 1973-10-23 1974-10-17 Beam positioning for optical scanning apparatus such as optical printers

Country Status (5)

Country Link
US (1) US3882509A (en)
JP (1) JPS5074442A (en)
DE (1) DE2450156A1 (en)
FR (1) FR2248525B1 (en)
GB (1) GB1483923A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6053855B2 (en) * 1977-10-24 1985-11-27 キヤノン株式会社 Galvano mirror scanner device
JPS5553780A (en) * 1978-10-16 1980-04-19 Fuji Photo Film Co Ltd Character recording device
DE19519396A1 (en) * 1995-05-26 1996-11-28 Huels Chemische Werke Ag New blocked polyisocyanates and a process for their preparation

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2786400A (en) * 1949-10-05 1957-03-26 Time Inc Justifying and character positioning apparatus for electronic photo-typecomposing system
US3434402A (en) * 1966-01-11 1969-03-25 Fairchild Camera Instr Co Turret font photocomposing machine

Also Published As

Publication number Publication date
FR2248525A1 (en) 1975-05-16
DE2450156A1 (en) 1975-04-24
JPS5074442A (en) 1975-06-19
FR2248525B1 (en) 1981-05-29
US3882509A (en) 1975-05-06

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee